I am getting a 51.2Y error from my Hewlett Packard Color LaserJet printer and I want to buy the correct part to fix it. I know that the printer is something in the color laser jet 5500 series, but I do not know which printer.

From the data plate, I have:
Product Number C9657A manufactured on February 3, 2004
Serial number JPHR010654

Can anybody tell me which printer I have?